>>715181371Placing "blocks" in 7DTD is not as immediate and easy as in Minecraft.
You need to place down frames, which cannot be stood upon, then "build" them to the tier of your liking (wood, metal, stone) by using a hammer and the resources required for whatever tier you like.
At least it's easy to break down unwanted structures, since the game has physics.
But still, it's not easy. And some POIs are designed to be walkable concrete boxes with no shortcuts.